Iozone: Performance Test of File I/O Version $Revision: 3.483 $ Compiled for 64 bit mode. Build: linux-AMD64 Contributors:William Norcott, Don Capps, Isom Crawford, Kirby Collins Al Slater, Scott Rhine, Mike Wisner, Ken Goss Steve Landherr, Brad Smith, Mark Kelly, Dr. Alain CYR, Randy Dunlap, Mark Montague, Dan Million, Gavin Brebner, Jean-Marc Zucconi, Jeff Blomberg, Benny Halevy, Dave Boone, Erik Habbinga, Kris Strecker, Walter Wong, Joshua Root, Fabrice Bacchella, Zhenghua Xue, Qin Li, Darren Sawyer, Vangel Bojaxhi, Ben England, Vikentsi Lapa, Alexey Skidanov, Sudhir Kumar. Run began: Mon Aug 10 23:39:54 2026 Auto Mode Machine = Linux oleg244-client.virtnet 4.18.0rh8.10-debug #2 SMP Mon Jul 14 01 Excel chart generation enabled Excel chart generation enabled Verify Mode. Pattern dbdbdbdb Performance measurements are invalid in this mode. Using maximum file size of 102400 kilobytes. Using Maximum Record Size 512 kB Command line used: iozone -a -M -R -V 0xab -g 100M -q 512k -i0 -i1 -f /mnt/lustre/d4.lustre-rsync-test/d0.iozone-oleg244-client.virtnet/iozone-file Output is in kBytes/sec Time Resolution = 0.000001 seconds. Processor cache size set to 1024 kBytes. Processor cache line size set to 32 bytes. File stride size set to 17 * record size. random random bkwd record stride kB reclen write rewrite read reread read write read rewrite read fwrite frewrite fread freread 64 4 2352 5128 621657 608965 64 8 3769 13562 703068 754443 64 16 2665 14334 1033216 280553 64 32 4088 18637 1210227 1363961 64 64 1350 32885 1232453 2133730 128 4 3845 7530 576161 563463 128 8 5166 15252 921183 895074 128 16 6723 16875 927549 780556 128 32 8544 36697 1185654 748976 128 64 8028 57972 291017 1598754 128 128 7582 55434 1336145 1377278 256 4 5313 8059 621448 547044 256 8 5220 13264 291239 815414 256 16 9609 24210 1642294 1143731 256 32 10760 48404 1208072 894929 256 64 15280 25853 1123389 937924 256 128 6090 22741 1561112 1579483 256 256 16886 45705 1763685 800221 512 4 8150 9142 133851 650593 512 8 13803 17300 854615 309355 512 16 7493 9004 1084694 973559 512 32 6712 16267 443712 573916 512 64 12563 27739 1454140 536762 512 128 14574 26221 195034 382672 512 256 28968 85019 2216629 593915 512 512 19487 88414 1279935 1759070 1024 4 3989 6888 317116 86493 1024 8 7485 16495 622476 370869 1024 16 13302 18153 1054547 157147 1024 32 18746 21693 589497 400769 1024 64 18345 27047 280079 600627 1024 128 26663 51832 1214706 924084 1024 256 17718 63863 485317 1590254 1024 512 26920 72772 297686 1360111 2048 4 5822 3980 257895 196886 2048 8 5790 8132 412327 182741 2048 16 18036 15365 439769 271362 2048 32 13124 15002 1316907 729828 2048 64 21723 38015 930068 760790 2048 128 30253 41259 1098765 432267 2048 256 28599 35414 412248 267400 2048 512 17776 41799 1785550 802512 4096 4 2864 4445 150477 189523 4096 8 7850 12527 564110 414324 4096 16 15923 12949 479793 306631 4096 32 16275 21275 631501 732591 4096 64 30320 33027 401644 348187 4096 128 25339 35419 784082 784368 4096 256 41931 35219 519204 1099877 4096 512 40447 41785 522648 836621 8192 4 4521 1738 279572 194248 8192 8 10005 10565 245785 290083 8192 16 15816 16510 531187 528109 8192 32 23407 25922 840362 480745 8192 64 24014 29788 1054018 541048 8192 128 24667 33797 594615 1182624 8192 256 21945 41262 343852 796105 8192 512 28556 49771 1406352 656048 16384 4 5439 5167 376143 189524 16384 8 6177 9325 519830 380395 16384 16 14402 15630 608843 454795 16384 32 26237 25999 709788 721352 16384 64 25696 41681 687216 671227 16384 128 35115 29432 1007619 710192 16384 256 27733 46305 552821 661420 16384 512 26922 51266 1292939 834979 32768 4 4974 5439 245817 265100 32768 8 11224 10294 442147 718173 32768 16 16073 14094 617950 385510 32768 32